I wasn't there Sunday but I have to agree. I go to flea markets all the time and if you wait til the end, you'll find that the good stuff is gone. At least the unique items (which I like

).
I think you can work a deal at any time so why wait until the good stuff is gone. If you're looking for a steal, then it's probably not coming from a seasoned dealer anyway. But I've found that if you're looking for a reasonable price on a good card, people are always willing to listen.
I hate being the last in. Maybe you get a screaming deal on a very gettable card but what fun is that. a few months waiting and searching on ebay will yield the same results. I go to the show to meet up with other collectors and find those interesting items that might not show up every day.
Just my .02 Take it for what it's worth.